Brainstem and Cortical Spreading Depolarization in a Closed Head Injury Rat Model

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2021 Nov 13

PMID 34769073

Citations 5

Authors

Refat Aboghazleh

Ellen Parker

Lynn T Yang

Daniela Kaufer

Jens P Dreier

Alon Friedman

Gerben van Hameren

Affiliations

Soon will be listed here.

Abstract

Traumatic brain injury (TBI) is the leading cause of death in young individuals, and is a major health concern that often leads to long-lasting complications. However, the electrophysiological events that occur immediately after traumatic brain injury, and may underlie impact outcomes, have not been fully elucidated. To investigate the electrophysiological events that immediately follow traumatic brain injury, a weight-drop model of traumatic brain injury was used in rats pre-implanted with epidural and intracerebral electrodes. Electrophysiological (near-direct current) recordings and simultaneous alternating current recordings of brain activity were started within seconds following impact. Cortical spreading depolarization (SD) and SD-induced spreading depression occurred in approximately 50% of mild and severe impacts. SD was recorded within three minutes after injury in either one or both brain hemispheres. Electrographic seizures were rare. While both TBI- and electrically induced SDs resulted in elevated oxidative stress, TBI-exposed brains showed a reduced antioxidant defense. In severe TBI, brainstem SD could be recorded in addition to cortical SD, but this did not lead to the death of the animals. Severe impact, however, led to immediate death in 24% of animals, and was electrocorticographically characterized by non-spreading depression (NSD) of activity followed by terminal SD in both cortex and brainstem.

Citing Articles

Repetitive cortical spreading depolarizations are prolonged early after experimental traumatic brain injury.

Best F, Hartings J, Ngwenya L Exp Neurol. 2024; 385:115120.

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Quantitative, real-time imaging of spreading depolarization-associated neuronal ROS production.

Ackermann M, Buchholz S, Dietrich K, Muller M Front Cell Neurosci. 2024; 18:1465531.

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From spreading depolarization to blood-brain barrier dysfunction: navigating traumatic brain injury for novel diagnosis and therapy.

van Hameren G, Aboghazleh R, Parker E, Dreier J, Kaufer D, Friedman A Nat Rev Neurol. 2024; 20(7):408-425.

PMID: 38886512 DOI: 10.1038/s41582-024-00973-9.

Dreier J, Lemale C, Horst V, Major S, Kola V, Schoknecht K Transl Stroke Res. 2024; 16(1):147-168.

PMID: 38396252 PMC: 11772537. DOI: 10.1007/s12975-024-01237-w.

Memantine inhibits cortical spreading depolarization and improves neurovascular function following repetitive traumatic brain injury.

MacLean M, Muradov J, Greene R, van Hameren G, Clarke D, Dreier J Sci Adv. 2023; 9(50):eadj2417.

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